11da177e4SLinus Torvalds /* dir.c: AFS filesystem directory handling 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. 41da177e4SLinus Torvalds * Written by David Howells (dhowells@redhat.com) 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 81da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 91da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/module.h> 141da177e4SLinus Torvalds #include <linux/init.h> 151da177e4SLinus Torvalds #include <linux/fs.h> 1634286d66SNick Piggin #include <linux/namei.h> 171da177e4SLinus Torvalds #include <linux/pagemap.h> 1800d3b7a4SDavid Howells #include <linux/ctype.h> 19e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 201da177e4SLinus Torvalds #include "internal.h" 211da177e4SLinus Torvalds 22260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 2300cd8dd3SAl Viro unsigned int flags); 241da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file); 251bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx); 260b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); 27fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry); 28260a9803SDavid Howells static void afs_d_release(struct dentry *dentry); 29ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen, 30afefdbb2SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 314acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 32ebfc3b49SAl Viro bool excl); 3318bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 34260a9803SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry); 35260a9803SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry); 36260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 37260a9803SDavid Howells struct dentry *dentry); 38260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 39260a9803SDavid Howells const char *content); 40260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 411cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 421cd66c93SMiklos Szeredi unsigned int flags); 431da177e4SLinus Torvalds 444b6f5d20SArjan van de Ven const struct file_operations afs_dir_file_operations = { 451da177e4SLinus Torvalds .open = afs_dir_open, 4600d3b7a4SDavid Howells .release = afs_release, 4729884effSAl Viro .iterate_shared = afs_readdir, 48e8d6c554SDavid Howells .lock = afs_lock, 493222a3e5SChristoph Hellwig .llseek = generic_file_llseek, 501da177e4SLinus Torvalds }; 511da177e4SLinus Torvalds 52754661f1SArjan van de Ven const struct inode_operations afs_dir_inode_operations = { 53260a9803SDavid Howells .create = afs_create, 54260a9803SDavid Howells .lookup = afs_lookup, 55260a9803SDavid Howells .link = afs_link, 56260a9803SDavid Howells .unlink = afs_unlink, 57260a9803SDavid Howells .symlink = afs_symlink, 58260a9803SDavid Howells .mkdir = afs_mkdir, 59260a9803SDavid Howells .rmdir = afs_rmdir, 602773bf00SMiklos Szeredi .rename = afs_rename, 6100d3b7a4SDavid Howells .permission = afs_permission, 62416351f2SDavid Howells .getattr = afs_getattr, 6331143d5dSDavid Howells .setattr = afs_setattr, 64d3e3b7eaSDavid Howells .listxattr = afs_listxattr, 651da177e4SLinus Torvalds }; 661da177e4SLinus Torvalds 67d61dcce2SAl Viro const struct dentry_operations afs_fs_dentry_operations = { 681da177e4SLinus Torvalds .d_revalidate = afs_d_revalidate, 691da177e4SLinus Torvalds .d_delete = afs_d_delete, 70260a9803SDavid Howells .d_release = afs_d_release, 71d18610b0SDavid Howells .d_automount = afs_d_automount, 721da177e4SLinus Torvalds }; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds #define AFS_DIR_HASHTBL_SIZE 128 751da177e4SLinus Torvalds #define AFS_DIR_DIRENT_SIZE 32 761da177e4SLinus Torvalds #define AFS_DIRENT_PER_BLOCK 64 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds union afs_dirent { 791da177e4SLinus Torvalds struct { 801da177e4SLinus Torvalds uint8_t valid; 811da177e4SLinus Torvalds uint8_t unused[1]; 821da177e4SLinus Torvalds __be16 hash_next; 831da177e4SLinus Torvalds __be32 vnode; 841da177e4SLinus Torvalds __be32 unique; 851da177e4SLinus Torvalds uint8_t name[16]; 861da177e4SLinus Torvalds uint8_t overflow[4]; /* if any char of the name (inc 871da177e4SLinus Torvalds * NUL) reaches here, consume 881da177e4SLinus Torvalds * the next dirent too */ 891da177e4SLinus Torvalds } u; 901da177e4SLinus Torvalds uint8_t extended_name[32]; 911da177e4SLinus Torvalds }; 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds /* AFS directory page header (one at the beginning of every 2048-byte chunk) */ 941da177e4SLinus Torvalds struct afs_dir_pagehdr { 951da177e4SLinus Torvalds __be16 npages; 961da177e4SLinus Torvalds __be16 magic; 971da177e4SLinus Torvalds #define AFS_DIR_MAGIC htons(1234) 981da177e4SLinus Torvalds uint8_t nentries; 991da177e4SLinus Torvalds uint8_t bitmap[8]; 1001da177e4SLinus Torvalds uint8_t pad[19]; 1011da177e4SLinus Torvalds }; 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds /* directory block layout */ 1041da177e4SLinus Torvalds union afs_dir_block { 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds struct afs_dir_pagehdr pagehdr; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds struct { 1091da177e4SLinus Torvalds struct afs_dir_pagehdr pagehdr; 1101da177e4SLinus Torvalds uint8_t alloc_ctrs[128]; 1111da177e4SLinus Torvalds /* dir hash table */ 1121da177e4SLinus Torvalds uint16_t hashtable[AFS_DIR_HASHTBL_SIZE]; 1131da177e4SLinus Torvalds } hdr; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds union afs_dirent dirents[AFS_DIRENT_PER_BLOCK]; 1161da177e4SLinus Torvalds }; 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds /* layout on a linux VM page */ 1191da177e4SLinus Torvalds struct afs_dir_page { 1201da177e4SLinus Torvalds union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)]; 1211da177e4SLinus Torvalds }; 1221da177e4SLinus Torvalds 123260a9803SDavid Howells struct afs_lookup_cookie { 1241bbae9f8SAl Viro struct dir_context ctx; 1251da177e4SLinus Torvalds struct afs_fid fid; 1261bbae9f8SAl Viro struct qstr name; 1271da177e4SLinus Torvalds int found; 1281da177e4SLinus Torvalds }; 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds /* 1311da177e4SLinus Torvalds * check that a directory page is valid 1321da177e4SLinus Torvalds */ 133dab17c1aSDavid Howells bool afs_dir_check_page(struct inode *dir, struct page *page) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds struct afs_dir_page *dbuf; 136dab17c1aSDavid Howells struct afs_vnode *vnode = AFS_FS_I(dir); 137dab17c1aSDavid Howells loff_t latter, i_size, off; 1381da177e4SLinus Torvalds int tmp, qty; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds #if 0 1411da177e4SLinus Torvalds /* check the page count */ 1421da177e4SLinus Torvalds qty = desc.size / sizeof(dbuf->blocks[0]); 1431da177e4SLinus Torvalds if (qty == 0) 1441da177e4SLinus Torvalds goto error; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds if (page->index == 0 && qty != ntohs(dbuf->blocks[0].pagehdr.npages)) { 1471da177e4SLinus Torvalds printk("kAFS: %s(%lu): wrong number of dir blocks %d!=%hu\n", 148530b6412SHarvey Harrison __func__, dir->i_ino, qty, 14908e0e7c8SDavid Howells ntohs(dbuf->blocks[0].pagehdr.npages)); 1501da177e4SLinus Torvalds goto error; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds #endif 1531da177e4SLinus Torvalds 154dab17c1aSDavid Howells /* Determine how many magic numbers there should be in this page, but 155dab17c1aSDavid Howells * we must take care because the directory may change size under us. 156dab17c1aSDavid Howells */ 157dab17c1aSDavid Howells off = page_offset(page); 158dab17c1aSDavid Howells i_size = i_size_read(dir); 159dab17c1aSDavid Howells if (i_size <= off) 160dab17c1aSDavid Howells goto checked; 161dab17c1aSDavid Howells 162dab17c1aSDavid Howells latter = i_size - off; 1631da177e4SLinus Torvalds if (latter >= PAGE_SIZE) 1641da177e4SLinus Torvalds qty = PAGE_SIZE; 1651da177e4SLinus Torvalds else 1661da177e4SLinus Torvalds qty = latter; 1671da177e4SLinus Torvalds qty /= sizeof(union afs_dir_block); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* check them */ 1701da177e4SLinus Torvalds dbuf = page_address(page); 1711da177e4SLinus Torvalds for (tmp = 0; tmp < qty; tmp++) { 1721da177e4SLinus Torvalds if (dbuf->blocks[tmp].pagehdr.magic != AFS_DIR_MAGIC) { 173dab17c1aSDavid Howells printk("kAFS: %s(%lx): bad magic %d/%d is %04hx\n", 174530b6412SHarvey Harrison __func__, dir->i_ino, tmp, qty, 1751da177e4SLinus Torvalds ntohs(dbuf->blocks[tmp].pagehdr.magic)); 176dab17c1aSDavid Howells trace_afs_dir_check_failed(vnode, off, i_size); 1771da177e4SLinus Torvalds goto error; 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds 181dab17c1aSDavid Howells checked: 1821da177e4SLinus Torvalds SetPageChecked(page); 183be5b82dbSAl Viro return true; 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds error: 1861da177e4SLinus Torvalds SetPageError(page); 187be5b82dbSAl Viro return false; 188ec26815aSDavid Howells } 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds /* 1911da177e4SLinus Torvalds * discard a page cached in the pagecache 1921da177e4SLinus Torvalds */ 1931da177e4SLinus Torvalds static inline void afs_dir_put_page(struct page *page) 1941da177e4SLinus Torvalds { 1951da177e4SLinus Torvalds kunmap(page); 196dab17c1aSDavid Howells unlock_page(page); 19709cbfeafSKirill A. Shutemov put_page(page); 198ec26815aSDavid Howells } 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds /* 2011da177e4SLinus Torvalds * get a page into the pagecache 2021da177e4SLinus Torvalds */ 20300d3b7a4SDavid Howells static struct page *afs_dir_get_page(struct inode *dir, unsigned long index, 20400d3b7a4SDavid Howells struct key *key) 2051da177e4SLinus Torvalds { 2061da177e4SLinus Torvalds struct page *page; 2071da177e4SLinus Torvalds _enter("{%lu},%lu", dir->i_ino, index); 2081da177e4SLinus Torvalds 209f6d335c0SAl Viro page = read_cache_page(dir->i_mapping, index, afs_page_filler, key); 2101da177e4SLinus Torvalds if (!IS_ERR(page)) { 211dab17c1aSDavid Howells lock_page(page); 2121da177e4SLinus Torvalds kmap(page); 213be5b82dbSAl Viro if (unlikely(!PageChecked(page))) { 214dab17c1aSDavid Howells if (PageError(page)) 2151da177e4SLinus Torvalds goto fail; 2161da177e4SLinus Torvalds } 217be5b82dbSAl Viro } 2181da177e4SLinus Torvalds return page; 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds fail: 2211da177e4SLinus Torvalds afs_dir_put_page(page); 22208e0e7c8SDavid Howells _leave(" = -EIO"); 2231da177e4SLinus Torvalds return ERR_PTR(-EIO); 224ec26815aSDavid Howells } 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds /* 2271da177e4SLinus Torvalds * open an AFS directory file 2281da177e4SLinus Torvalds */ 2291da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file) 2301da177e4SLinus Torvalds { 2311da177e4SLinus Torvalds _enter("{%lu}", inode->i_ino); 2321da177e4SLinus Torvalds 2332ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); 2342ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(union afs_dirent) != 32); 2351da177e4SLinus Torvalds 23608e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) 2371da177e4SLinus Torvalds return -ENOENT; 2381da177e4SLinus Torvalds 23900d3b7a4SDavid Howells return afs_open(inode, file); 240ec26815aSDavid Howells } 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds /* 2431da177e4SLinus Torvalds * deal with one block in an AFS directory 2441da177e4SLinus Torvalds */ 2451bbae9f8SAl Viro static int afs_dir_iterate_block(struct dir_context *ctx, 2461da177e4SLinus Torvalds union afs_dir_block *block, 2471bbae9f8SAl Viro unsigned blkoff) 2481da177e4SLinus Torvalds { 2491da177e4SLinus Torvalds union afs_dirent *dire; 2501da177e4SLinus Torvalds unsigned offset, next, curr; 2511da177e4SLinus Torvalds size_t nlen; 2521bbae9f8SAl Viro int tmp; 2531da177e4SLinus Torvalds 2541bbae9f8SAl Viro _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); 2551da177e4SLinus Torvalds 2561bbae9f8SAl Viro curr = (ctx->pos - blkoff) / sizeof(union afs_dirent); 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds /* walk through the block, an entry at a time */ 2591da177e4SLinus Torvalds for (offset = AFS_DIRENT_PER_BLOCK - block->pagehdr.nentries; 2601da177e4SLinus Torvalds offset < AFS_DIRENT_PER_BLOCK; 2611da177e4SLinus Torvalds offset = next 2621da177e4SLinus Torvalds ) { 2631da177e4SLinus Torvalds next = offset + 1; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds /* skip entries marked unused in the bitmap */ 2661da177e4SLinus Torvalds if (!(block->pagehdr.bitmap[offset / 8] & 2671da177e4SLinus Torvalds (1 << (offset % 8)))) { 2685b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: unused", 2691da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), offset); 2701da177e4SLinus Torvalds if (offset >= curr) 2711bbae9f8SAl Viro ctx->pos = blkoff + 2721da177e4SLinus Torvalds next * sizeof(union afs_dirent); 2731da177e4SLinus Torvalds continue; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* got a valid entry */ 2771da177e4SLinus Torvalds dire = &block->dirents[offset]; 2781da177e4SLinus Torvalds nlen = strnlen(dire->u.name, 2791da177e4SLinus Torvalds sizeof(*block) - 2801da177e4SLinus Torvalds offset * sizeof(union afs_dirent)); 2811da177e4SLinus Torvalds 2825b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: %s %zu \"%s\"", 2831da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), offset, 2841da177e4SLinus Torvalds (offset < curr ? "skip" : "fill"), 2851da177e4SLinus Torvalds nlen, dire->u.name); 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds /* work out where the next possible entry is */ 2881da177e4SLinus Torvalds for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_dirent)) { 2891da177e4SLinus Torvalds if (next >= AFS_DIRENT_PER_BLOCK) { 2905b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 2911da177e4SLinus Torvalds " %u travelled beyond end dir block" 2925b5e0928SAlexey Dobriyan " (len %u/%zu)", 2931da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 2941da177e4SLinus Torvalds offset, next, tmp, nlen); 2951da177e4SLinus Torvalds return -EIO; 2961da177e4SLinus Torvalds } 2971da177e4SLinus Torvalds if (!(block->pagehdr.bitmap[next / 8] & 2981da177e4SLinus Torvalds (1 << (next % 8)))) { 2995b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3005b5e0928SAlexey Dobriyan " %u unmarked extension (len %u/%zu)", 3011da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 3021da177e4SLinus Torvalds offset, next, tmp, nlen); 3031da177e4SLinus Torvalds return -EIO; 3041da177e4SLinus Torvalds } 3051da177e4SLinus Torvalds 3065b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: ext %u/%zu", 3071da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 3081da177e4SLinus Torvalds next, tmp, nlen); 3091da177e4SLinus Torvalds next++; 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds /* skip if starts before the current position */ 3131da177e4SLinus Torvalds if (offset < curr) 3141da177e4SLinus Torvalds continue; 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds /* found the next entry */ 3171bbae9f8SAl Viro if (!dir_emit(ctx, dire->u.name, nlen, 3181da177e4SLinus Torvalds ntohl(dire->u.vnode), 3191bbae9f8SAl Viro ctx->actor == afs_lookup_filldir ? 3201bbae9f8SAl Viro ntohl(dire->u.unique) : DT_UNKNOWN)) { 3211da177e4SLinus Torvalds _leave(" = 0 [full]"); 3221da177e4SLinus Torvalds return 0; 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds 3251bbae9f8SAl Viro ctx->pos = blkoff + next * sizeof(union afs_dirent); 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds _leave(" = 1 [more]"); 3291da177e4SLinus Torvalds return 1; 330ec26815aSDavid Howells } 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds /* 33308e0e7c8SDavid Howells * iterate through the data blob that lists the contents of an AFS directory 3341da177e4SLinus Torvalds */ 3351bbae9f8SAl Viro static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, 3361bbae9f8SAl Viro struct key *key) 3371da177e4SLinus Torvalds { 3381da177e4SLinus Torvalds union afs_dir_block *dblock; 3391da177e4SLinus Torvalds struct afs_dir_page *dbuf; 3401da177e4SLinus Torvalds struct page *page; 3411da177e4SLinus Torvalds unsigned blkoff, limit; 3421da177e4SLinus Torvalds int ret; 3431da177e4SLinus Torvalds 3441bbae9f8SAl Viro _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); 3451da177e4SLinus Torvalds 34608e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { 3471da177e4SLinus Torvalds _leave(" = -ESTALE"); 3481da177e4SLinus Torvalds return -ESTALE; 3491da177e4SLinus Torvalds } 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds /* round the file position up to the next entry boundary */ 3521bbae9f8SAl Viro ctx->pos += sizeof(union afs_dirent) - 1; 3531bbae9f8SAl Viro ctx->pos &= ~(sizeof(union afs_dirent) - 1); 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds /* walk through the blocks in sequence */ 3561da177e4SLinus Torvalds ret = 0; 3571bbae9f8SAl Viro while (ctx->pos < dir->i_size) { 3581bbae9f8SAl Viro blkoff = ctx->pos & ~(sizeof(union afs_dir_block) - 1); 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds /* fetch the appropriate page from the directory */ 36100d3b7a4SDavid Howells page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key); 3621da177e4SLinus Torvalds if (IS_ERR(page)) { 3631da177e4SLinus Torvalds ret = PTR_ERR(page); 3641da177e4SLinus Torvalds break; 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds limit = blkoff & ~(PAGE_SIZE - 1); 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds dbuf = page_address(page); 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds /* deal with the individual blocks stashed on this page */ 3721da177e4SLinus Torvalds do { 3731da177e4SLinus Torvalds dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / 3741da177e4SLinus Torvalds sizeof(union afs_dir_block)]; 3751bbae9f8SAl Viro ret = afs_dir_iterate_block(ctx, dblock, blkoff); 3761da177e4SLinus Torvalds if (ret != 1) { 3771da177e4SLinus Torvalds afs_dir_put_page(page); 3781da177e4SLinus Torvalds goto out; 3791da177e4SLinus Torvalds } 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds blkoff += sizeof(union afs_dir_block); 3821da177e4SLinus Torvalds 3831bbae9f8SAl Viro } while (ctx->pos < dir->i_size && blkoff < limit); 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds afs_dir_put_page(page); 3861da177e4SLinus Torvalds ret = 0; 3871da177e4SLinus Torvalds } 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds out: 3901da177e4SLinus Torvalds _leave(" = %d", ret); 3911da177e4SLinus Torvalds return ret; 392ec26815aSDavid Howells } 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds /* 3951da177e4SLinus Torvalds * read an AFS directory 3961da177e4SLinus Torvalds */ 3971bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx) 3981da177e4SLinus Torvalds { 399215804a9SDavid Howells return afs_dir_iterate(file_inode(file), ctx, afs_file_key(file)); 400ec26815aSDavid Howells } 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds /* 4031da177e4SLinus Torvalds * search the directory for a name 4041da177e4SLinus Torvalds * - if afs_dir_iterate_block() spots this function, it'll pass the FID 4051da177e4SLinus Torvalds * uniquifier through dtype 4061da177e4SLinus Torvalds */ 407ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, 408ac7576f4SMiklos Szeredi int nlen, loff_t fpos, u64 ino, unsigned dtype) 4091da177e4SLinus Torvalds { 410ac7576f4SMiklos Szeredi struct afs_lookup_cookie *cookie = 411ac7576f4SMiklos Szeredi container_of(ctx, struct afs_lookup_cookie, ctx); 4121da177e4SLinus Torvalds 4131bbae9f8SAl Viro _enter("{%s,%u},%s,%u,,%llu,%u", 4141bbae9f8SAl Viro cookie->name.name, cookie->name.len, name, nlen, 415ba3e0e1aSDavid S. Miller (unsigned long long) ino, dtype); 4161da177e4SLinus Torvalds 41708e0e7c8SDavid Howells /* insanity checks first */ 41808e0e7c8SDavid Howells BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); 41908e0e7c8SDavid Howells BUILD_BUG_ON(sizeof(union afs_dirent) != 32); 42008e0e7c8SDavid Howells 4211bbae9f8SAl Viro if (cookie->name.len != nlen || 4221bbae9f8SAl Viro memcmp(cookie->name.name, name, nlen) != 0) { 4231da177e4SLinus Torvalds _leave(" = 0 [no]"); 4241da177e4SLinus Torvalds return 0; 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds cookie->fid.vnode = ino; 4281da177e4SLinus Torvalds cookie->fid.unique = dtype; 4291da177e4SLinus Torvalds cookie->found = 1; 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds _leave(" = -1 [found]"); 4321da177e4SLinus Torvalds return -1; 433ec26815aSDavid Howells } 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds /* 43608e0e7c8SDavid Howells * do a lookup in a directory 437260a9803SDavid Howells * - just returns the FID the dentry name maps to if found 4381da177e4SLinus Torvalds */ 43908e0e7c8SDavid Howells static int afs_do_lookup(struct inode *dir, struct dentry *dentry, 44000d3b7a4SDavid Howells struct afs_fid *fid, struct key *key) 4411da177e4SLinus Torvalds { 4421bbae9f8SAl Viro struct afs_super_info *as = dir->i_sb->s_fs_info; 4431bbae9f8SAl Viro struct afs_lookup_cookie cookie = { 4441bbae9f8SAl Viro .ctx.actor = afs_lookup_filldir, 4451bbae9f8SAl Viro .name = dentry->d_name, 4461bbae9f8SAl Viro .fid.vid = as->volume->vid 4471bbae9f8SAl Viro }; 4481da177e4SLinus Torvalds int ret; 4491da177e4SLinus Torvalds 450a455589fSAl Viro _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* search the directory */ 4531bbae9f8SAl Viro ret = afs_dir_iterate(dir, &cookie.ctx, key); 4541da177e4SLinus Torvalds if (ret < 0) { 45508e0e7c8SDavid Howells _leave(" = %d [iter]", ret); 45608e0e7c8SDavid Howells return ret; 4571da177e4SLinus Torvalds } 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds ret = -ENOENT; 4601da177e4SLinus Torvalds if (!cookie.found) { 46108e0e7c8SDavid Howells _leave(" = -ENOENT [not found]"); 46208e0e7c8SDavid Howells return -ENOENT; 46308e0e7c8SDavid Howells } 46408e0e7c8SDavid Howells 46508e0e7c8SDavid Howells *fid = cookie.fid; 46608e0e7c8SDavid Howells _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique); 46708e0e7c8SDavid Howells return 0; 46808e0e7c8SDavid Howells } 46908e0e7c8SDavid Howells 47008e0e7c8SDavid Howells /* 471bec5eb61Swanglei * Try to auto mount the mountpoint with pseudo directory, if the autocell 472bec5eb61Swanglei * operation is setted. 473bec5eb61Swanglei */ 474bec5eb61Swanglei static struct inode *afs_try_auto_mntpt( 475bec5eb61Swanglei int ret, struct dentry *dentry, struct inode *dir, struct key *key, 476bec5eb61Swanglei struct afs_fid *fid) 477bec5eb61Swanglei { 478bec5eb61Swanglei const char *devname = dentry->d_name.name; 479bec5eb61Swanglei struct afs_vnode *vnode = AFS_FS_I(dir); 480bec5eb61Swanglei struct inode *inode; 481bec5eb61Swanglei 482a455589fSAl Viro _enter("%d, %p{%pd}, {%x:%u}, %p", 483a455589fSAl Viro ret, dentry, dentry, vnode->fid.vid, vnode->fid.vnode, key); 484bec5eb61Swanglei 485bec5eb61Swanglei if (ret != -ENOENT || 486bec5eb61Swanglei !test_bit(AFS_VNODE_AUTOCELL, &vnode->flags)) 487bec5eb61Swanglei goto out; 488bec5eb61Swanglei 489bec5eb61Swanglei inode = afs_iget_autocell(dir, devname, strlen(devname), key); 490bec5eb61Swanglei if (IS_ERR(inode)) { 491bec5eb61Swanglei ret = PTR_ERR(inode); 492bec5eb61Swanglei goto out; 493bec5eb61Swanglei } 494bec5eb61Swanglei 495bec5eb61Swanglei *fid = AFS_FS_I(inode)->fid; 496bec5eb61Swanglei _leave("= %p", inode); 497bec5eb61Swanglei return inode; 498bec5eb61Swanglei 499bec5eb61Swanglei out: 500bec5eb61Swanglei _leave("= %d", ret); 501bec5eb61Swanglei return ERR_PTR(ret); 502bec5eb61Swanglei } 503bec5eb61Swanglei 504bec5eb61Swanglei /* 50508e0e7c8SDavid Howells * look up an entry in a directory 50608e0e7c8SDavid Howells */ 507260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 50800cd8dd3SAl Viro unsigned int flags) 50908e0e7c8SDavid Howells { 51008e0e7c8SDavid Howells struct afs_vnode *vnode; 51108e0e7c8SDavid Howells struct afs_fid fid; 51208e0e7c8SDavid Howells struct inode *inode; 51300d3b7a4SDavid Howells struct key *key; 51408e0e7c8SDavid Howells int ret; 51508e0e7c8SDavid Howells 516260a9803SDavid Howells vnode = AFS_FS_I(dir); 517260a9803SDavid Howells 518a455589fSAl Viro _enter("{%x:%u},%p{%pd},", 519a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, dentry); 520260a9803SDavid Howells 5212b0143b5SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 52208e0e7c8SDavid Howells 52345222b9eSDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 52408e0e7c8SDavid Howells _leave(" = -ENAMETOOLONG"); 52508e0e7c8SDavid Howells return ERR_PTR(-ENAMETOOLONG); 52608e0e7c8SDavid Howells } 52708e0e7c8SDavid Howells 52808e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { 52908e0e7c8SDavid Howells _leave(" = -ESTALE"); 53008e0e7c8SDavid Howells return ERR_PTR(-ESTALE); 53108e0e7c8SDavid Howells } 53208e0e7c8SDavid Howells 53300d3b7a4SDavid Howells key = afs_request_key(vnode->volume->cell); 53400d3b7a4SDavid Howells if (IS_ERR(key)) { 53500d3b7a4SDavid Howells _leave(" = %ld [key]", PTR_ERR(key)); 536e231c2eeSDavid Howells return ERR_CAST(key); 53700d3b7a4SDavid Howells } 53800d3b7a4SDavid Howells 539260a9803SDavid Howells ret = afs_validate(vnode, key); 54008e0e7c8SDavid Howells if (ret < 0) { 54100d3b7a4SDavid Howells key_put(key); 542260a9803SDavid Howells _leave(" = %d [val]", ret); 5431da177e4SLinus Torvalds return ERR_PTR(ret); 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds 546260a9803SDavid Howells ret = afs_do_lookup(dir, dentry, &fid, key); 547260a9803SDavid Howells if (ret < 0) { 548bec5eb61Swanglei inode = afs_try_auto_mntpt(ret, dentry, dir, key, &fid); 549bec5eb61Swanglei if (!IS_ERR(inode)) { 550bec5eb61Swanglei key_put(key); 551bec5eb61Swanglei goto success; 552bec5eb61Swanglei } 553bec5eb61Swanglei 554bec5eb61Swanglei ret = PTR_ERR(inode); 555260a9803SDavid Howells key_put(key); 556260a9803SDavid Howells if (ret == -ENOENT) { 557260a9803SDavid Howells d_add(dentry, NULL); 558260a9803SDavid Howells _leave(" = NULL [negative]"); 559260a9803SDavid Howells return NULL; 560260a9803SDavid Howells } 561260a9803SDavid Howells _leave(" = %d [do]", ret); 562260a9803SDavid Howells return ERR_PTR(ret); 563260a9803SDavid Howells } 564260a9803SDavid Howells dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version; 565260a9803SDavid Howells 5661da177e4SLinus Torvalds /* instantiate the dentry */ 567d2ddc776SDavid Howells inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL, NULL); 56800d3b7a4SDavid Howells key_put(key); 56908e0e7c8SDavid Howells if (IS_ERR(inode)) { 57008e0e7c8SDavid Howells _leave(" = %ld", PTR_ERR(inode)); 571e231c2eeSDavid Howells return ERR_CAST(inode); 5721da177e4SLinus Torvalds } 5731da177e4SLinus Torvalds 574bec5eb61Swanglei success: 5751da177e4SLinus Torvalds d_add(dentry, inode); 576d6e43f75SDavid Howells _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%u }", 57708e0e7c8SDavid Howells fid.vnode, 57808e0e7c8SDavid Howells fid.unique, 5792b0143b5SDavid Howells d_inode(dentry)->i_ino, 5802b0143b5SDavid Howells d_inode(dentry)->i_generation); 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds return NULL; 583ec26815aSDavid Howells } 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds /* 5861da177e4SLinus Torvalds * check that a dentry lookup hit has found a valid entry 5871da177e4SLinus Torvalds * - NOTE! the hit can be a negative hit too, so we can't assume we have an 5881da177e4SLinus Torvalds * inode 5891da177e4SLinus Torvalds */ 5900b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) 5911da177e4SLinus Torvalds { 592260a9803SDavid Howells struct afs_vnode *vnode, *dir; 593dd0d9a46SArtem Bityutskiy struct afs_fid uninitialized_var(fid); 5941da177e4SLinus Torvalds struct dentry *parent; 595c435ee34SDavid Howells struct inode *inode; 59600d3b7a4SDavid Howells struct key *key; 597260a9803SDavid Howells void *dir_version; 5981da177e4SLinus Torvalds int ret; 5991da177e4SLinus Torvalds 6000b728e19SAl Viro if (flags & LOOKUP_RCU) 60134286d66SNick Piggin return -ECHILD; 60234286d66SNick Piggin 603c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 6042b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 605a455589fSAl Viro _enter("{v={%x:%u} n=%pd fl=%lx},", 606a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, 607260a9803SDavid Howells vnode->flags); 608c435ee34SDavid Howells } else { 609a455589fSAl Viro _enter("{neg n=%pd}", dentry); 610c435ee34SDavid Howells } 6111da177e4SLinus Torvalds 612260a9803SDavid Howells key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); 61300d3b7a4SDavid Howells if (IS_ERR(key)) 61400d3b7a4SDavid Howells key = NULL; 61500d3b7a4SDavid Howells 616c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 617c435ee34SDavid Howells inode = d_inode(dentry); 618c435ee34SDavid Howells if (inode) { 619c435ee34SDavid Howells vnode = AFS_FS_I(inode); 620c435ee34SDavid Howells afs_validate(vnode, key); 621c435ee34SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 622c435ee34SDavid Howells goto out_bad; 623c435ee34SDavid Howells } 624c435ee34SDavid Howells } 625c435ee34SDavid Howells 6261da177e4SLinus Torvalds /* lock down the parent dentry so we can peer at it */ 62708e0e7c8SDavid Howells parent = dget_parent(dentry); 6282b0143b5SDavid Howells dir = AFS_FS_I(d_inode(parent)); 6291da177e4SLinus Torvalds 630260a9803SDavid Howells /* validate the parent directory */ 631260a9803SDavid Howells afs_validate(dir, key); 632260a9803SDavid Howells 633260a9803SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { 634a455589fSAl Viro _debug("%pd: parent dir deleted", dentry); 635c435ee34SDavid Howells goto out_bad_parent; 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds 638260a9803SDavid Howells dir_version = (void *) (unsigned long) dir->status.data_version; 639260a9803SDavid Howells if (dentry->d_fsdata == dir_version) 640260a9803SDavid Howells goto out_valid; /* the dir contents are unchanged */ 641260a9803SDavid Howells 64208e0e7c8SDavid Howells _debug("dir modified"); 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds /* search the directory for this vnode */ 645260a9803SDavid Howells ret = afs_do_lookup(&dir->vfs_inode, dentry, &fid, key); 646260a9803SDavid Howells switch (ret) { 647260a9803SDavid Howells case 0: 648260a9803SDavid Howells /* the filename maps to something */ 6492b0143b5SDavid Howells if (d_really_is_negative(dentry)) 650c435ee34SDavid Howells goto out_bad_parent; 651c435ee34SDavid Howells inode = d_inode(dentry); 652c435ee34SDavid Howells if (is_bad_inode(inode)) { 653a455589fSAl Viro printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", 654a455589fSAl Viro dentry); 655c435ee34SDavid Howells goto out_bad_parent; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds 658c435ee34SDavid Howells vnode = AFS_FS_I(inode); 659c435ee34SDavid Howells 6601da177e4SLinus Torvalds /* if the vnode ID has changed, then the dirent points to a 6611da177e4SLinus Torvalds * different file */ 66208e0e7c8SDavid Howells if (fid.vnode != vnode->fid.vnode) { 663a455589fSAl Viro _debug("%pd: dirent changed [%u != %u]", 664a455589fSAl Viro dentry, fid.vnode, 66508e0e7c8SDavid Howells vnode->fid.vnode); 6661da177e4SLinus Torvalds goto not_found; 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds 6691da177e4SLinus Torvalds /* if the vnode ID uniqifier has changed, then the file has 670260a9803SDavid Howells * been deleted and replaced, and the original vnode ID has 671260a9803SDavid Howells * been reused */ 67208e0e7c8SDavid Howells if (fid.unique != vnode->fid.unique) { 673a455589fSAl Viro _debug("%pd: file deleted (uq %u -> %u I:%u)", 674a455589fSAl Viro dentry, fid.unique, 6757a224228SJean Noel Cordenner vnode->fid.unique, 676c435ee34SDavid Howells vnode->vfs_inode.i_generation); 677c435ee34SDavid Howells write_seqlock(&vnode->cb_lock); 67808e0e7c8SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 679c435ee34SDavid Howells write_sequnlock(&vnode->cb_lock); 680260a9803SDavid Howells goto not_found; 681260a9803SDavid Howells } 682260a9803SDavid Howells goto out_valid; 683260a9803SDavid Howells 684260a9803SDavid Howells case -ENOENT: 685260a9803SDavid Howells /* the filename is unknown */ 686a455589fSAl Viro _debug("%pd: dirent not found", dentry); 6872b0143b5SDavid Howells if (d_really_is_positive(dentry)) 688260a9803SDavid Howells goto not_found; 689260a9803SDavid Howells goto out_valid; 690260a9803SDavid Howells 691260a9803SDavid Howells default: 692a455589fSAl Viro _debug("failed to iterate dir %pd: %d", 693a455589fSAl Viro parent, ret); 694c435ee34SDavid Howells goto out_bad_parent; 6951da177e4SLinus Torvalds } 69608e0e7c8SDavid Howells 6971da177e4SLinus Torvalds out_valid: 698260a9803SDavid Howells dentry->d_fsdata = dir_version; 6991da177e4SLinus Torvalds dput(parent); 70000d3b7a4SDavid Howells key_put(key); 7011da177e4SLinus Torvalds _leave(" = 1 [valid]"); 7021da177e4SLinus Torvalds return 1; 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds /* the dirent, if it exists, now points to a different vnode */ 7051da177e4SLinus Torvalds not_found: 7061da177e4SLinus Torvalds spin_lock(&dentry->d_lock); 7071da177e4SLinus Torvalds dentry->d_flags |= DCACHE_NFSFS_RENAMED; 7081da177e4SLinus Torvalds spin_unlock(&dentry->d_lock); 7091da177e4SLinus Torvalds 710c435ee34SDavid Howells out_bad_parent: 711a455589fSAl Viro _debug("dropping dentry %pd2", dentry); 7121da177e4SLinus Torvalds dput(parent); 713c435ee34SDavid Howells out_bad: 71400d3b7a4SDavid Howells key_put(key); 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds _leave(" = 0 [bad]"); 7171da177e4SLinus Torvalds return 0; 718ec26815aSDavid Howells } 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds /* 7211da177e4SLinus Torvalds * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't 7221da177e4SLinus Torvalds * sleep) 7231da177e4SLinus Torvalds * - called from dput() when d_count is going to 0. 7241da177e4SLinus Torvalds * - return 1 to request dentry be unhashed, 0 otherwise 7251da177e4SLinus Torvalds */ 726fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry) 7271da177e4SLinus Torvalds { 728a455589fSAl Viro _enter("%pd", dentry); 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 7311da177e4SLinus Torvalds goto zap; 7321da177e4SLinus Torvalds 7332b0143b5SDavid Howells if (d_really_is_positive(dentry) && 7342b0143b5SDavid Howells (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(d_inode(dentry))->flags) || 7352b0143b5SDavid Howells test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(d_inode(dentry))->flags))) 7361da177e4SLinus Torvalds goto zap; 7371da177e4SLinus Torvalds 7381da177e4SLinus Torvalds _leave(" = 0 [keep]"); 7391da177e4SLinus Torvalds return 0; 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds zap: 7421da177e4SLinus Torvalds _leave(" = 1 [zap]"); 7431da177e4SLinus Torvalds return 1; 744ec26815aSDavid Howells } 745260a9803SDavid Howells 746260a9803SDavid Howells /* 747260a9803SDavid Howells * handle dentry release 748260a9803SDavid Howells */ 749260a9803SDavid Howells static void afs_d_release(struct dentry *dentry) 750260a9803SDavid Howells { 751a455589fSAl Viro _enter("%pd", dentry); 752260a9803SDavid Howells } 753260a9803SDavid Howells 754260a9803SDavid Howells /* 755d2ddc776SDavid Howells * Create a new inode for create/mkdir/symlink 756d2ddc776SDavid Howells */ 757d2ddc776SDavid Howells static void afs_vnode_new_inode(struct afs_fs_cursor *fc, 758d2ddc776SDavid Howells struct dentry *new_dentry, 759d2ddc776SDavid Howells struct afs_fid *newfid, 760d2ddc776SDavid Howells struct afs_file_status *newstatus, 761d2ddc776SDavid Howells struct afs_callback *newcb) 762d2ddc776SDavid Howells { 763d2ddc776SDavid Howells struct inode *inode; 764d2ddc776SDavid Howells 765d2ddc776SDavid Howells if (fc->ac.error < 0) 766d2ddc776SDavid Howells return; 767d2ddc776SDavid Howells 768bc1527dcSDavid Howells d_drop(new_dentry); 769bc1527dcSDavid Howells 770d2ddc776SDavid Howells inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key, 771d2ddc776SDavid Howells newfid, newstatus, newcb, fc->cbi); 772d2ddc776SDavid Howells if (IS_ERR(inode)) { 773d2ddc776SDavid Howells /* ENOMEM or EINTR at a really inconvenient time - just abandon 774d2ddc776SDavid Howells * the new directory on the server. 775d2ddc776SDavid Howells */ 776d2ddc776SDavid Howells fc->ac.error = PTR_ERR(inode); 777d2ddc776SDavid Howells return; 778d2ddc776SDavid Howells } 779d2ddc776SDavid Howells 780bc1527dcSDavid Howells d_add(new_dentry, inode); 781d2ddc776SDavid Howells } 782d2ddc776SDavid Howells 783d2ddc776SDavid Howells /* 784260a9803SDavid Howells * create a directory on an AFS filesystem 785260a9803SDavid Howells */ 78618bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 787260a9803SDavid Howells { 788d2ddc776SDavid Howells struct afs_file_status newstatus; 789d2ddc776SDavid Howells struct afs_fs_cursor fc; 790d2ddc776SDavid Howells struct afs_callback newcb; 791d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 792d2ddc776SDavid Howells struct afs_fid newfid; 793260a9803SDavid Howells struct key *key; 794260a9803SDavid Howells int ret; 795260a9803SDavid Howells 796d2ddc776SDavid Howells mode |= S_IFDIR; 797260a9803SDavid Howells 798a455589fSAl Viro _enter("{%x:%u},{%pd},%ho", 799a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 800260a9803SDavid Howells 801260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 802260a9803SDavid Howells if (IS_ERR(key)) { 803260a9803SDavid Howells ret = PTR_ERR(key); 804260a9803SDavid Howells goto error; 805260a9803SDavid Howells } 806260a9803SDavid Howells 807d2ddc776SDavid Howells ret = -ERESTARTSYS; 808d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 809d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 810d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 811d2ddc776SDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 812d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 813d2ddc776SDavid Howells } 814d2ddc776SDavid Howells 815d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 816d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 817d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 818d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 819260a9803SDavid Howells if (ret < 0) 820d2ddc776SDavid Howells goto error_key; 8214433b691SDavid Howells } else { 8224433b691SDavid Howells goto error_key; 823260a9803SDavid Howells } 824260a9803SDavid Howells 825260a9803SDavid Howells key_put(key); 826260a9803SDavid Howells _leave(" = 0"); 827260a9803SDavid Howells return 0; 828260a9803SDavid Howells 829d2ddc776SDavid Howells error_key: 830260a9803SDavid Howells key_put(key); 831260a9803SDavid Howells error: 832260a9803SDavid Howells d_drop(dentry); 833260a9803SDavid Howells _leave(" = %d", ret); 834260a9803SDavid Howells return ret; 835260a9803SDavid Howells } 836260a9803SDavid Howells 837260a9803SDavid Howells /* 838d2ddc776SDavid Howells * Remove a subdir from a directory. 839260a9803SDavid Howells */ 840d2ddc776SDavid Howells static void afs_dir_remove_subdir(struct dentry *dentry) 841260a9803SDavid Howells { 8422b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 843d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 844d2ddc776SDavid Howells 845260a9803SDavid Howells clear_nlink(&vnode->vfs_inode); 846260a9803SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 847c435ee34SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 848260a9803SDavid Howells } 849260a9803SDavid Howells } 850260a9803SDavid Howells 851260a9803SDavid Howells /* 852d2ddc776SDavid Howells * remove a directory from an AFS filesystem 853260a9803SDavid Howells */ 854d2ddc776SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry) 855260a9803SDavid Howells { 856d2ddc776SDavid Howells struct afs_fs_cursor fc; 857d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 858260a9803SDavid Howells struct key *key; 859260a9803SDavid Howells int ret; 860260a9803SDavid Howells 861a455589fSAl Viro _enter("{%x:%u},{%pd}", 862a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry); 863260a9803SDavid Howells 864260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 865260a9803SDavid Howells if (IS_ERR(key)) { 866260a9803SDavid Howells ret = PTR_ERR(key); 867260a9803SDavid Howells goto error; 868260a9803SDavid Howells } 869260a9803SDavid Howells 870d2ddc776SDavid Howells ret = -ERESTARTSYS; 871d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 872d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 873d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 874d2ddc776SDavid Howells afs_fs_remove(&fc, dentry->d_name.name, true); 875260a9803SDavid Howells } 876260a9803SDavid Howells 877d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 878d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 879d2ddc776SDavid Howells if (ret == 0) 880d2ddc776SDavid Howells afs_dir_remove_subdir(dentry); 881260a9803SDavid Howells } 882260a9803SDavid Howells 883260a9803SDavid Howells key_put(key); 884d2ddc776SDavid Howells error: 885d2ddc776SDavid Howells return ret; 886d2ddc776SDavid Howells } 887260a9803SDavid Howells 888d2ddc776SDavid Howells /* 889d2ddc776SDavid Howells * Remove a link to a file or symlink from a directory. 890d2ddc776SDavid Howells * 891d2ddc776SDavid Howells * If the file was not deleted due to excess hard links, the fileserver will 892d2ddc776SDavid Howells * break the callback promise on the file - if it had one - before it returns 893d2ddc776SDavid Howells * to us, and if it was deleted, it won't 894d2ddc776SDavid Howells * 895d2ddc776SDavid Howells * However, if we didn't have a callback promise outstanding, or it was 896d2ddc776SDavid Howells * outstanding on a different server, then it won't break it either... 897d2ddc776SDavid Howells */ 898d2ddc776SDavid Howells static int afs_dir_remove_link(struct dentry *dentry, struct key *key) 899d2ddc776SDavid Howells { 900d2ddc776SDavid Howells int ret = 0; 901d2ddc776SDavid Howells 902d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 903d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 904d2ddc776SDavid Howells 905d2ddc776SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 906d2ddc776SDavid Howells kdebug("AFS_VNODE_DELETED"); 907d2ddc776SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 908d2ddc776SDavid Howells 909d2ddc776SDavid Howells ret = afs_validate(vnode, key); 910d2ddc776SDavid Howells if (ret == -ESTALE) 911d2ddc776SDavid Howells ret = 0; 912d2ddc776SDavid Howells _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); 913d2ddc776SDavid Howells } 914d2ddc776SDavid Howells 915d2ddc776SDavid Howells return ret; 916d2ddc776SDavid Howells } 917d2ddc776SDavid Howells 918d2ddc776SDavid Howells /* 919d2ddc776SDavid Howells * Remove a file or symlink from an AFS filesystem. 920d2ddc776SDavid Howells */ 921d2ddc776SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry) 922d2ddc776SDavid Howells { 923d2ddc776SDavid Howells struct afs_fs_cursor fc; 924d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; 925d2ddc776SDavid Howells struct key *key; 926d2ddc776SDavid Howells int ret; 927d2ddc776SDavid Howells 928d2ddc776SDavid Howells _enter("{%x:%u},{%pd}", 929d2ddc776SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry); 930d2ddc776SDavid Howells 931d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 932d2ddc776SDavid Howells return -ENAMETOOLONG; 933d2ddc776SDavid Howells 934d2ddc776SDavid Howells key = afs_request_key(dvnode->volume->cell); 935d2ddc776SDavid Howells if (IS_ERR(key)) { 936d2ddc776SDavid Howells ret = PTR_ERR(key); 937d2ddc776SDavid Howells goto error; 938d2ddc776SDavid Howells } 939d2ddc776SDavid Howells 940d2ddc776SDavid Howells /* Try to make sure we have a callback promise on the victim. */ 941d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 942d2ddc776SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 943d2ddc776SDavid Howells ret = afs_validate(vnode, key); 944d2ddc776SDavid Howells if (ret < 0) 945d2ddc776SDavid Howells goto error_key; 946d2ddc776SDavid Howells } 947d2ddc776SDavid Howells 948d2ddc776SDavid Howells ret = -ERESTARTSYS; 949d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 950d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 951d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 952d2ddc776SDavid Howells afs_fs_remove(&fc, dentry->d_name.name, false); 953d2ddc776SDavid Howells } 954d2ddc776SDavid Howells 955d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 956d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 957d2ddc776SDavid Howells if (ret == 0) 958d2ddc776SDavid Howells ret = afs_dir_remove_link(dentry, key); 959d2ddc776SDavid Howells } 960d2ddc776SDavid Howells 961d2ddc776SDavid Howells error_key: 962260a9803SDavid Howells key_put(key); 963260a9803SDavid Howells error: 964260a9803SDavid Howells _leave(" = %d", ret); 965260a9803SDavid Howells return ret; 966260a9803SDavid Howells } 967260a9803SDavid Howells 968260a9803SDavid Howells /* 969260a9803SDavid Howells * create a regular file on an AFS filesystem 970260a9803SDavid Howells */ 9714acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 972ebfc3b49SAl Viro bool excl) 973260a9803SDavid Howells { 974d2ddc776SDavid Howells struct afs_fs_cursor fc; 975d2ddc776SDavid Howells struct afs_file_status newstatus; 976d2ddc776SDavid Howells struct afs_callback newcb; 97743dd388bSColin Ian King struct afs_vnode *dvnode = AFS_FS_I(dir); 978d2ddc776SDavid Howells struct afs_fid newfid; 979260a9803SDavid Howells struct key *key; 980260a9803SDavid Howells int ret; 981260a9803SDavid Howells 982d2ddc776SDavid Howells mode |= S_IFREG; 983260a9803SDavid Howells 984a455589fSAl Viro _enter("{%x:%u},{%pd},%ho,", 985a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 986260a9803SDavid Howells 987d2ddc776SDavid Howells ret = -ENAMETOOLONG; 988d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 989d2ddc776SDavid Howells goto error; 990d2ddc776SDavid Howells 991260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 992260a9803SDavid Howells if (IS_ERR(key)) { 993260a9803SDavid Howells ret = PTR_ERR(key); 994260a9803SDavid Howells goto error; 995260a9803SDavid Howells } 996260a9803SDavid Howells 997d2ddc776SDavid Howells ret = -ERESTARTSYS; 998d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 999d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1000d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1001d2ddc776SDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1002d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 1003d2ddc776SDavid Howells } 1004d2ddc776SDavid Howells 1005d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1006d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1007d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 1008d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1009260a9803SDavid Howells if (ret < 0) 1010d2ddc776SDavid Howells goto error_key; 10114433b691SDavid Howells } else { 10124433b691SDavid Howells goto error_key; 1013260a9803SDavid Howells } 1014260a9803SDavid Howells 1015260a9803SDavid Howells key_put(key); 1016260a9803SDavid Howells _leave(" = 0"); 1017260a9803SDavid Howells return 0; 1018260a9803SDavid Howells 1019d2ddc776SDavid Howells error_key: 1020260a9803SDavid Howells key_put(key); 1021260a9803SDavid Howells error: 1022260a9803SDavid Howells d_drop(dentry); 1023260a9803SDavid Howells _leave(" = %d", ret); 1024260a9803SDavid Howells return ret; 1025260a9803SDavid Howells } 1026260a9803SDavid Howells 1027260a9803SDavid Howells /* 1028260a9803SDavid Howells * create a hard link between files in an AFS filesystem 1029260a9803SDavid Howells */ 1030260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 1031260a9803SDavid Howells struct dentry *dentry) 1032260a9803SDavid Howells { 1033d2ddc776SDavid Howells struct afs_fs_cursor fc; 1034260a9803SDavid Howells struct afs_vnode *dvnode, *vnode; 1035260a9803SDavid Howells struct key *key; 1036260a9803SDavid Howells int ret; 1037260a9803SDavid Howells 10382b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(from)); 1039260a9803SDavid Howells dvnode = AFS_FS_I(dir); 1040260a9803SDavid Howells 1041a455589fSAl Viro _enter("{%x:%u},{%x:%u},{%pd}", 1042260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1043260a9803SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 1044a455589fSAl Viro dentry); 1045260a9803SDavid Howells 1046d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1047d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1048d2ddc776SDavid Howells goto error; 1049d2ddc776SDavid Howells 1050260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1051260a9803SDavid Howells if (IS_ERR(key)) { 1052260a9803SDavid Howells ret = PTR_ERR(key); 1053260a9803SDavid Howells goto error; 1054260a9803SDavid Howells } 1055260a9803SDavid Howells 1056d2ddc776SDavid Howells ret = -ERESTARTSYS; 1057d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1058d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { 1059d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1060bc1527dcSDavid Howells goto error_key; 1061d2ddc776SDavid Howells } 1062260a9803SDavid Howells 1063d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1064d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1065d2ddc776SDavid Howells fc.cb_break_2 = vnode->cb_break + vnode->cb_s_break; 1066d2ddc776SDavid Howells afs_fs_link(&fc, vnode, dentry->d_name.name); 1067d2ddc776SDavid Howells } 1068d2ddc776SDavid Howells 1069d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1070d2ddc776SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2); 10717de9c6eeSAl Viro ihold(&vnode->vfs_inode); 1072260a9803SDavid Howells d_instantiate(dentry, &vnode->vfs_inode); 1073d2ddc776SDavid Howells 1074d2ddc776SDavid Howells mutex_unlock(&vnode->io_lock); 1075d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1076d2ddc776SDavid Howells if (ret < 0) 1077d2ddc776SDavid Howells goto error_key; 10784433b691SDavid Howells } else { 10794433b691SDavid Howells goto error_key; 1080d2ddc776SDavid Howells } 1081d2ddc776SDavid Howells 1082260a9803SDavid Howells key_put(key); 1083260a9803SDavid Howells _leave(" = 0"); 1084260a9803SDavid Howells return 0; 1085260a9803SDavid Howells 1086d2ddc776SDavid Howells error_key: 1087260a9803SDavid Howells key_put(key); 1088260a9803SDavid Howells error: 1089260a9803SDavid Howells d_drop(dentry); 1090260a9803SDavid Howells _leave(" = %d", ret); 1091260a9803SDavid Howells return ret; 1092260a9803SDavid Howells } 1093260a9803SDavid Howells 1094260a9803SDavid Howells /* 1095260a9803SDavid Howells * create a symlink in an AFS filesystem 1096260a9803SDavid Howells */ 1097260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 1098260a9803SDavid Howells const char *content) 1099260a9803SDavid Howells { 1100d2ddc776SDavid Howells struct afs_fs_cursor fc; 1101d2ddc776SDavid Howells struct afs_file_status newstatus; 1102d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1103d2ddc776SDavid Howells struct afs_fid newfid; 1104260a9803SDavid Howells struct key *key; 1105260a9803SDavid Howells int ret; 1106260a9803SDavid Howells 1107a455589fSAl Viro _enter("{%x:%u},{%pd},%s", 1108a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, 1109260a9803SDavid Howells content); 1110260a9803SDavid Howells 1111d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1112d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1113d2ddc776SDavid Howells goto error; 1114d2ddc776SDavid Howells 1115260a9803SDavid Howells ret = -EINVAL; 111645222b9eSDavid Howells if (strlen(content) >= AFSPATHMAX) 1117260a9803SDavid Howells goto error; 1118260a9803SDavid Howells 1119260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1120260a9803SDavid Howells if (IS_ERR(key)) { 1121260a9803SDavid Howells ret = PTR_ERR(key); 1122260a9803SDavid Howells goto error; 1123260a9803SDavid Howells } 1124260a9803SDavid Howells 1125d2ddc776SDavid Howells ret = -ERESTARTSYS; 1126d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1127d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1128d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1129d2ddc776SDavid Howells afs_fs_symlink(&fc, dentry->d_name.name, content, 1130d2ddc776SDavid Howells &newfid, &newstatus); 1131d2ddc776SDavid Howells } 1132d2ddc776SDavid Howells 1133d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1134d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1135d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, NULL); 1136d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1137260a9803SDavid Howells if (ret < 0) 1138d2ddc776SDavid Howells goto error_key; 11394433b691SDavid Howells } else { 11404433b691SDavid Howells goto error_key; 1141260a9803SDavid Howells } 1142260a9803SDavid Howells 1143260a9803SDavid Howells key_put(key); 1144260a9803SDavid Howells _leave(" = 0"); 1145260a9803SDavid Howells return 0; 1146260a9803SDavid Howells 1147d2ddc776SDavid Howells error_key: 1148260a9803SDavid Howells key_put(key); 1149260a9803SDavid Howells error: 1150260a9803SDavid Howells d_drop(dentry); 1151260a9803SDavid Howells _leave(" = %d", ret); 1152260a9803SDavid Howells return ret; 1153260a9803SDavid Howells } 1154260a9803SDavid Howells 1155260a9803SDavid Howells /* 1156260a9803SDavid Howells * rename a file in an AFS filesystem and/or move it between directories 1157260a9803SDavid Howells */ 1158260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 11591cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 11601cd66c93SMiklos Szeredi unsigned int flags) 1161260a9803SDavid Howells { 1162d2ddc776SDavid Howells struct afs_fs_cursor fc; 1163260a9803SDavid Howells struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; 1164260a9803SDavid Howells struct key *key; 1165260a9803SDavid Howells int ret; 1166260a9803SDavid Howells 11671cd66c93SMiklos Szeredi if (flags) 11681cd66c93SMiklos Szeredi return -EINVAL; 11691cd66c93SMiklos Szeredi 11702b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(old_dentry)); 1171260a9803SDavid Howells orig_dvnode = AFS_FS_I(old_dir); 1172260a9803SDavid Howells new_dvnode = AFS_FS_I(new_dir); 1173260a9803SDavid Howells 1174a455589fSAl Viro _enter("{%x:%u},{%x:%u},{%x:%u},{%pd}", 1175260a9803SDavid Howells orig_dvnode->fid.vid, orig_dvnode->fid.vnode, 1176260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1177260a9803SDavid Howells new_dvnode->fid.vid, new_dvnode->fid.vnode, 1178a455589fSAl Viro new_dentry); 1179260a9803SDavid Howells 1180260a9803SDavid Howells key = afs_request_key(orig_dvnode->volume->cell); 1181260a9803SDavid Howells if (IS_ERR(key)) { 1182260a9803SDavid Howells ret = PTR_ERR(key); 1183260a9803SDavid Howells goto error; 1184260a9803SDavid Howells } 1185260a9803SDavid Howells 1186d2ddc776SDavid Howells ret = -ERESTARTSYS; 1187d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, orig_dvnode, key)) { 1188d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) { 1189d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { 1190d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1191bc1527dcSDavid Howells goto error_key; 1192d2ddc776SDavid Howells } 1193d2ddc776SDavid Howells } 1194d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1195d2ddc776SDavid Howells fc.cb_break = orig_dvnode->cb_break + orig_dvnode->cb_s_break; 1196d2ddc776SDavid Howells fc.cb_break_2 = new_dvnode->cb_break + new_dvnode->cb_s_break; 1197d2ddc776SDavid Howells afs_fs_rename(&fc, old_dentry->d_name.name, 1198d2ddc776SDavid Howells new_dvnode, new_dentry->d_name.name); 1199d2ddc776SDavid Howells } 1200d2ddc776SDavid Howells 1201d2ddc776SDavid Howells afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break); 1202d2ddc776SDavid Howells afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2); 1203d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) 1204d2ddc776SDavid Howells mutex_unlock(&new_dvnode->io_lock); 1205d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1206260a9803SDavid Howells if (ret < 0) 1207d2ddc776SDavid Howells goto error_key; 1208d2ddc776SDavid Howells } 1209d2ddc776SDavid Howells 1210d2ddc776SDavid Howells error_key: 1211260a9803SDavid Howells key_put(key); 1212260a9803SDavid Howells error: 1213260a9803SDavid Howells _leave(" = %d", ret); 1214260a9803SDavid Howells return ret; 1215260a9803SDavid Howells } 1216